Class VariableGapTermsIndexWriter
- java.lang.Object
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- org.apache.lucene.codecs.blockterms.TermsIndexWriterBase
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- org.apache.lucene.codecs.blockterms.VariableGapTermsIndexWriter
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- All Implemented Interfaces:
Closeable
,AutoCloseable
public class VariableGapTermsIndexWriter extends TermsIndexWriterBase
Selects index terms according to provided pluggableVariableGapTermsIndexWriter.IndexTermSelector
, and stores them in a prefix trie that's loaded entirely in RAM stored as an FST. This terms index only supports unsigned byte term sort order (unicode codepoint order when the bytes are UTF8).- WARNING: This API is experimental and might change in incompatible ways in the next release.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
VariableGapTermsIndexWriter.EveryNOrDocFreqTermSelector
Sets an index term when docFreq >= docFreqThresh, or every interval terms.static class
VariableGapTermsIndexWriter.EveryNTermSelector
Same policy asFixedGapTermsIndexWriter
static class
VariableGapTermsIndexWriter.IndexTermSelector
Hook for selecting which terms should be placed in the terms index.-
Nested classes/interfaces inherited from class org.apache.lucene.codecs.blockterms.TermsIndexWriterBase
TermsIndexWriterBase.FieldWriter
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Field Summary
Fields Modifier and Type Field Description protected IndexOutput
out
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Constructor Summary
Constructors Constructor Description VariableGapTermsIndexWriter(SegmentWriteState state, VariableGapTermsIndexWriter.IndexTermSelector policy)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TermsIndexWriterBase.FieldWriter
addField(FieldInfo field, long termsFilePointer)
void
close()
protected int
indexedTermPrefixLength(BytesRef priorTerm, BytesRef indexedTerm)
NOTE: if your codec does not sort in unicode code point order, you must override this method, to simply return indexedTerm.length.
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Field Detail
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out
protected IndexOutput out
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Constructor Detail
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VariableGapTermsIndexWriter
public VariableGapTermsIndexWriter(SegmentWriteState state, VariableGapTermsIndexWriter.IndexTermSelector policy) throws IOException
- Throws:
IOException
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Method Detail
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addField
public TermsIndexWriterBase.FieldWriter addField(FieldInfo field, long termsFilePointer) throws IOException
- Specified by:
addField
in classTermsIndexWriterBase
- Throws:
IOException
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indexedTermPrefixLength
protected int indexedTermPrefixLength(BytesRef priorTerm, BytesRef indexedTerm)
NOTE: if your codec does not sort in unicode code point order, you must override this method, to simply return indexedTerm.length.
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close
public void close() throws IOException
- Throws:
IOException
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